We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Symmetry breaking in the tunnelling conductance...
View graph of relations

« Back

Symmetry breaking in the tunnelling conductance of a superconducting vortex

Research output: Contribution to journalLetter


Journal publication date1996
JournalJournal of Physics: Condensed Matter
Number of pages8
Original languageEnglish


Recent STM experiments on c-axis tunnelling into a vortex core of YBCO have yielded a sub-gap differential conductance which is not invariant under a reversal of the applied bias. By computing the differential conductance G(E) of a normal-superconducting contact to all orders in the tunnelling strength, we predict that in the absence of open channels in the superconductor, G(E) is necessarily an even function of E and that an asymmetric current-voltage characteristic implies the existence of propagating bound-states within the vortex core.